I think dreams has the answer to Fbone's quicky. (At least, it looks right to me.)

A quick riddle. No doubt it will pose no problem to you lot.

We are little creatures;
all of us have different features.
One of us in glass is set;
one of us you'll find in jet.
Another you may see in tin,
and the fourth is boxed within .
If the fifth you should pursue,
it can never fly from you.
What are we?